Machine for manufacturing pipes or conduits from cement, &amp;c.



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No. 818,158. PATENTED APR. 17, 1906. C. GIRARDOT. MACHINE EURMANU1.Q.G'1`U1111\1Gr PIPES OR GONDUITS FROM CEMENT, 150. APPLICATIONFILED JAN. 3, 1905.

No. 818,158. PATENTED APR. 17, 1906. C., GIRARDOT.

MACHINE FOR MANUFACTURING PIPES 0R CCNDUI'I'S PROM CEMENT, IGIAPPLICATION FILED JAN. 3. 1905.

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NHED STATES FA'FNT CFFlfQE,

CLAUDE GIRARDOR OF VITRY-LE-FRANCOIS, FRANCE, ASSIGNOR TO SOCIETE J. ETA PAVIN DE LAFARGE, OF VIVIERS, FRANCE.

Specification of Letters Patent.

Patented April 17, 1906;

Application iiled January 3, 1905. Serial No. 239,509.

To (1f/ZZ wiz/0m, t wwf/y concern,.-

Be it known that l, CLAUDE GIRARDOT, engineer, a citizen ofthe FrenchRepublic, residing at Vitryle-Francois, Marne, France, have inventedcertain new and useful Improvementsgin Machines for Manufacturing Pipesor Conduits from Cement Mortar or the Like, of which the following is aspecification.

This invention has forv its object to provide a machine formanufacturing pipes or conduits from cement, mortar, or the like bymechanical ramming with adjustable automatic feed of the material, sothat the pipes produced are homogeneous throughout their length, aresult which is not practically attainable by hand-ramming.

In theaccompanying drawings, Figure 1 is a vertical section of themachine. Fig. 2 is a section through the line A A of Fig. 1. Fig. 3 is asection through the line B B of Fig. 1.

The machine proper consists of a bed-plate carrying a vertical shaft 1,resting at its lower end in a rotary table 2, on which are arranged themolds 3. The said vertical shaft l has rotary motion imparted to it byany suitable means. A suitable feeding device (not shown) may beemployed for supplying material to the mold. A platform 4, carried by along sleeve 5, loose on `the vertical shaft 1, carries on one of itssides a ram 6, while the opposite side carries a device 7 for adjustingthe height of the ram relatively to the contents of the mold. rlhe ramhas a comparatively short stroke and is worked at a high speed-say fromthree to six hundred blows per minute-and it can be actuated byelectricity or compressed air or any known or suitable mechanical means.For example, the ram-operating mechanism may comprise a horizontal shaft8, carrying a wiper 8 and rotated by an electric or other motor 9. Thewiper in its rotation lifts a vertical rod 10, (preferably by bearing ona roller 12 on the rod,) terminating at its lower end in a ram 11. Whenthe wiper 8 ceases to bear on the roller 12, the ram falls, and theaction of gravity may be supplemented by that spring 13, surrounding thevertical rod and of such strength as will produce the desiredacceleration of the movement of the ram, this acceleration varying withthe speed of rotation of the mold. The height to which the ram is raisedis constant; but the point at which the downward stroke terminatesvaries with the amount of material in the mold. The whole of theram-operating mechanism may be arranged on the platform 4, and it may bebrought nearer to or farther from the vertical shaft 1, so as to bringthe ram over the center of the width of material to be rammed down.

The mold consists of an external casing 14 of cylindrical or other shape(made in two or more parts connected together by bolts, keys, straps, orother suitable devices) and of an internal core 15 of cylindrical shape,preferably made of a sheet of rolled steel the edges of which overlapeach other by about three centimeters, the core having then a diameterwhich is, say, one centimeter less than the bore of the pipe or conduitto be made. At its lower and upper parts the core is connected by links16 to rings 17, fixed to the vertical shaft 1 of the machine. Theselinks are ljointed to the rings and the core and are slightly oblique,so that as they descend or rise the coremay be contracted or expandeduntil the two edges of the core butt together.

A ring 18-say of cast-iron and of suitable shape-is laid at the lowerpart of the mold between the core and casing 14 to keep them at auniform distance apart and give the necessary shape to the lower part ofthe pipe or conduit, the links besides serving to expand the core keepit coaxial with the shaft. Metal templets 19, of suitable shape andcarried by an arm 20, are arranged at the upper part of the mold betweenthe casing and core, so as to keep the top of the casing coaxial withthe shaft and at the same time form the upper part of the pipe orconduit.

A small vertical shaft 21 inside the core carries arms 22, which byslight rotary motion are caused to bear on an angle-iron 23, rivetedinside the core and acting as a stop to prevent the core from closingunder the reactions of the ramming operation.

The operation of the machine is as follows: The vertical shaft 1,carrying the core, (which shaft is provided with a balanced raisingmechanism,) being in its raised position, the outer casing 14 of themold is placed on the rotary table, together with the ring 18, forshaping the lower part of the pipe or conduit. The said vertical shaftis then lowered with IOC) the templets until the lower part of the saidvertical shaft engages with the table at 24, so that the core 15 restson the said table 2, and the links 16 give the normal diameter to thecore and the templets 19 come between the upper parts of the core andcasing, thereby rendering them coaxial with the shaft. In this positionthe platform 4, carrying the ram, which is only partly balanced, islowered and bears on a ring 25 at the upper part of the core. The lowerpart of the ram is then a little above the ring 18 in the bottom of thespace between the core and casing, while the device 7 for adjusting theheight of the platform above the material in the mold rests on the saidring. The material having been placed in the feeding device, which hasbeen adjusted to work at the proper speed, the vertical shaft and therotary-table mold are rotated. The platform 4 being prevented by a stop26 from participating in the rotary motion of the shaft, the whole ofthe ramming device moves in one and the same vertical plane. As therotary motion proceeds the mold is lled by the automatic feeding devicewith a layer of material of a thickness which can be varied by theattendant according to the amount of ramming to be obtained. The ram byrepeated blows compresses the material firmly between the outer casingand the core, and the part that has thus been rammed comes in contactwith the device 7 for adjusting the height of the platform, which isthereby raised so as to be at a constant height above the material to berammed. When the mold is filled to the height of the templets 19, theworking of the ram is stopped and the ramming mechanism is raised, whilethe supply of material and the rotation of the vertical shaft stillcontinue. The material on passing under the templets is in consequenceof the rotary motion firmly compressed, and the upper end of the pipe orconduit is shaped in accordance with the contour of the said templets.rThe pipe or conduit being finished, the withdrawal of the mold iseffected by raising the vertical shaft, which takes along with it thecore, which is contracted automatically by the motion of the links 16,and the outer casing is removed from outside the pipe or conduit formedtherein and resting on the aforesaid ring.

The pipe or conduit can then be removed from the rotary table.

Having thus described and ascertained the nature of my invention and inwhat manner the same may be performed, I declare that what I claim is 1.A molding-machine of the class described, comprising a rotary table, amold mounted on said table comprising a casing and a core, a shaftcarrying said core and extending through the latter and being detachablyconnected to said table for rotating the same, a platform looselymounted on said shaft, ramming mechanism carried by said platform, agage carried by said platform for adjusting the height thereof inaccordance with the height of the material in the mold, and meanscarried by said shaft for expanding and contracting the core.

2. A molding-machine of the class described, comprising a rotary table,a mold mounted thereon comprising a casing and an expansible core, meanslocated within said core for locking it in its expanded position, ashaft extending through said core and detachably connected to said tablefor rotating the same, arms pivotally connecting said shaft and saidcore, a support mounted on the said shaft, templets carried by saidsupport and extending between said casing and said core to maintain thelatter parts in concentric relation, a platform loosely mounted on saidshaft, a ramming device mounted on said platform, and a gage mounted onsaid platform for adjusting the height thereof in accordance with theamount of material in the mold.

3. A mold involving an outer casing and an inner expansible split core,a stop carried by one part of said core, a rotary shaft mounted in theother part, and locking-arms carried by said rotary shaft and adaptedtobe turned thereby into engagement with said stop to lock the core in itsexpanded position.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

CLAUDE GIRARDOT.

